Concentrator.



W. A. H.UELSDONK. c'owcemnmon.

APPLICATIONTILED SEPT. I8. 1916.

Patented Oct. 30, 1917.

2 SHEETS-SHEET l.

W. A. HUELSDONK.

CONCENTRATOR.

APPLICATION FILED SEPT. 18, 1916.

1,2445 1 1 Patented Oct. 30, 1917.

2 SHEETS-SHEET 2.'

fZWWW rrEn sTATE-srATENT orrron.

WILLIAM A; Hnnisnonir, oF MonEsro, onrironma;

To aZZ whom it may concern:-

Be it known that 1, WILLIAM A. Hunts- DONK, a citizen of-the UnitedStates, resid- .ing atModesto,inthe county ofStanislaus,

State of California, have invented' certain new and usefulImprovementsfin Concentrators; and I do declare the-following to be afull, clear, and exact description'of the same, reference being had tothe accompanying drawings, and to the characters of reference markedthereon, which form a partof this application.

1 This invention relates to improvements in concentrating apparatusespecially adapted for use in connection with placer mining, the objectof the "invention being to. produce in combination with a concentratingtable of specific construction. a feed trough or hopper therefor whichwill properly'feed and distribute the. sand and gravel upon theItable'to produce the most efficient results.

A further object of the invention is to produce certain cooperatingmechanism whereby the concentrator will be continuously vibrated so asto settle the precious metals and allow the lighter nonprecious materialto be readily carried off. I aim also to produce a concentrator whichcanbe operated with a minimum amount of water andone in. which only thefiner sand and gravel containing the precious metals will be ultimatelypassed to (the distributor.

A further object of the invention is to producea simple and inexpensivedevice and yet one which will be exceedingly .eifective for the purposesfor which it is designed.

These objects I accomplish by" means of such structure and relativearrangement of parts as. will fully appear by a perusal of the followingspecification and claims. 7

1n the, drawings similar characters of reference indicate correspondingparts in the several views. 7

Figural is a side elevation of the com- A plete device.

Fig. 2 is a top plan view of the concentrating table.

Fig. 3 is a sectional view on a line X.-X of Fig. l.

Fig. 4 is a sectional view on a line YY of Fig. 2.

. Fig. 5' is a view of the dischargingi'end of the concentrating table.

Referring now more particularly to the characters l of reference on thedrawings, the numeral 1 designates the supporting:

concnivrneroa.

Specification of Letters Patent. ,Pa ten ted Get, 30, Application filedSeptember 18, I916. -SeriaLN0. 1205620; I I

frame: At oneend thereof is aspindle2 ..inou-nted on which is asupporting frame 3 carrying the separating screen 4. The vibrating rod 5is connected withthe frame 3. at one end and withfthe lever 6 attheother-end. The other endof the lever 6 is provided with a crank arm 7movablein "aguide '8 and being provided with roller 9 arranged to;be'engaged by a camlO. The cam 10 is onthe shaftll which is arranged .to berotated by means'of a. pulley'12 coninected by a=beltfl3 with a pulleyl4-operi -ated by a suitablemotor l5. A spring 16 normally holds theframe 3 inthat position. which will cause the vibrating rodr5 frame 3and consequently the screen 4wi'1l be constantly vibrated so as to shakethe .material. therein to separate the fine material to'holdthe lever 6so that the roller 9 will .be constantly in the path of the cam 10. Thuswith the rotation ofthecam' 10, the

from the coarse as is common in this class I of screen. While thematerial is being passed through the screen 4, it is continually ,wettedfrom the spray pipe 17 fed from the pump .18 connected 'with anysuitable source of supply and operated by and in connection with thepowermotor 15 as is clearly shown in Fig. '1. Thefiner sand, gravel andprecious metals, together with the water passing through the screen 4,are

delivered into the distributer which is dis- 4. This distributing trough:23 is provided with a plurality of openings 24, along its lower edge,those openings nearest the screen-4 being somewhat higher thanthebalance so that thelighter material will be first discharged on tothe concentrating table 20. M

The openings 24 are regulated by slidable plates. 25 was to control theamount of flow of the material therethrough. As the material flowsthrough the holes 24, it first strikes deflecting plates 26whichdischarge upon the distributing-plate which distributing plate inturnidischarges upon the distributing plates 27 which, as noted, arespaced slightly from the plate 22 and curve downwardly to dischargeagainst the center iii of the concentrating table 20 on each side of thecentral beading 19.

The concentrating table 20 is especially constructed in the followingmanner,

namely: At its receiving end the lowesti'i points of its surface'are'adjacent'the bead ing 19 and its surface then slopes upwardlyonboth sides of the said beading to the outer edges where there are smallretaining rims 28. at a where the lowest points of the surface deflectoutwardly toward the discharging end of the table 20 to points as at b,the sides thereof sloping upwardly on both sides from thelines 0 so asto form a sub- .stantial gully or ditch terminating into a dischargingchute 29 at the end of the table 20 for carrying off the high gradeprecious metals and into side chutes 30 for carrying off the lowergrades. The concentrating tableQO is kept in a constant vibratorymotionby means of the cam 10 directing against a roller 31 on the thrust rod32 movable through a guide 33 and connected by a rod 34-. with the underside of the table 20 near one end thereof as at 35. The said table ismounted onball and socket supports 36 to allow of this-vibratory motionand the roller is held in constant engagement with the cam 10 by meansof springs 37.

From the foregoing description it will readily appear that I haveproduced a distributer and concentrator in which, after the coarse rockis screened from the light sand and gravel, the latter will be carriedby the water spray directly into the distributor, which distributer, byreason of its construction, will distribute the material equally allalong the concentrating table, the lighter material passing out firsttoward the upper end of the table. Upon being distributed upon thetable, the precious material such as gold, platinum or the like, beingheavy will tend tos'ettle into the lower portions cl adjacent thebeading 19 as described, while the lighter material will flow up theinclined surface and wash over the edges of thetable, the retaining rims28 preventing any overflow of the precious metals. The vibration of the,table combining with the flow of the water will cause the preciousmetals to travel along the lengthof the table until the point a isreached, where they will be diverged along the line 0 and thence offinto the chute 29. The better grade of material being the heavier willnaturally follow the ditch, 0 and pass through onto and out through thechute 29 while the lighter or less valuable materials will pass throughthe outlet slots 30 and thence'onto the chutes 30 and be carried olf.through said chutes.

This condition'continues to points as By means of my improvedconcentrating table acting in the manner above described, the, actionthereof will be very similar to that of the commonly used washing panwhich effectually washes off the lighter nonvaluable material and washesthe valuable materials onto the crevices where they can be held andcontrolled and eventually handled as founddesirable. T

From the foregoing description it will be readily seen that I haveproduced such .a device as substantially fulfils the objects oftheinvention as set forth herein. 7

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail maybe resorted to as do not form a departurefrom the spirit ofthe invention, as defined by the appended claims. Having thus describedmy invention what I claim as new anduseful and desire to secure byLetters Patent is: l. The combination with a concentrating table, of adistributing trough arranged along the length of the tableand having aplurality of openings, a distributing plate disposed immediately betweenthedistributer'and the concentrating table, deflecting plates between.the'openings and said distributing plate for directing the materialfrom the distributer upon said distributing plate, and curveddistributing plates spaced on each side of the first named distributingplate to discharge on said table.

2. A concentrating table having a beading, the side of the table slopingupwardly :from the beading to the opposite edge of the table for aportion .of the length of. the 1 table so asto form a gully along thebead ing, such gully then deflecting obliquely from the heading todischarge atthe end of the table near the outer edge thereof, the sidesof the latter portion of the gully sloplng upwardlytorthe beading andopposite edge of 'the table respectively.

3...A concentrating table having a bead mg, the side of the tablesloping upwardly from the heading to the opposite edge of the 1? tablefor'aportion of the length of the tableso as to form a gully along thebeading, such gully then deflecting obliquely from the beading todischarge at the end of the table near the outer edge thereof, the

sides of the latter portion of the gully sloping. upwardly to thebeading and opposite edge of the table respectively, thetable beingprovided with an outlet slot opening through the edge of the table intothe one side of the obliquely extending portion of the gully. V

- In testimony whereof I aflix my signature.

WILLIAM A. HUELSDO-NK.

Copiesfoi this patent may be obtained for five cents each, by addressing'the.Coinmissioner.offzitents, i

Washington,'D.0.f i

